NodePort
Contents
Exposes a container to the outside world.
Provides a ClusterIP + opens a port (node port) on all the cluster nodes to contact the service from the outside.
- port → the port that can be used by other pods, from inside the cluster, using DNS.
- targetPort → the port to be opened on the pod
- nodePort → the port exposed by all the cluster nodes to connect this service (between 30000 and 32767)
Node port creation
Configuration file
apiVersion: v1
kind: Service
metadata:
name: client-node-port
spec:
type: NodePort
selector:
component: web
ports:
- port: 3050
targetPort: 3000
nodePort: 31512
Note: here, the service does NOT reference the deployment. Only the pods, thanks to a selector.
kubectl
kubectl expose deployment <deployment-name> --name=<new-service-name> --type=NodePort --target-port 3000 --port 3050 --node-port 3000
Note: here, the deployment referenced. It's selector is used to construct the service.
Attachments